Henry edward bowring



(No Model.)

H. E. BOWBING.

BOAT LOWERING APPARATUS.

No. 479,387. Patented July 19, 1892.

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(for/m UNITED STATES PATENT FFICE.

HENRY EDWARD BOW'RING, OF EAST MOLESEY, ENGLAND.

BOAT-LOWERING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 479,387, dated July 19,1892. Application filed April 17, 1891. Serial No. 389,376. (No model.)Patented in England October 14:, 1890,110. 16,364-

To all whom it may concern.-

Be it known that I, HENRY EDWARD BOW- RING, gentleman, a subject of theQueen of Great Britain, residing at Mole Bank, East Molesey, in thecounty of Surrey, England,

have invented Improvements in Boat-Lowering Apparatus, (for which I havereceived Letters Patent in Great Britain, No. 16,364, dated October 14,1890,) of which the follow- IO ing is a specification.

My invention relates to improvements in the falls of boat-loweringapparatus; and its object is to diminish the amount of swinging to whichboats hanging from the falls are liable up to the moment of freeing thefalls from them. In carrying it into effect I combine a horizontal barwith the top of the suspension-bar, to which it is made fast in anyconvenient way. Each end of this horizontal bar is coupled by a rod tothe fall at a point a short distance above the point of suspension.

Referring to the accompanying drawings, Figure 1 is a transversesectional elevation of a boat fittedwitha lowering apparatus madeaccording to my invention. Fig. 2 is a side elevation corresponding withFig. 1. A portion of the bow is broken away to allow the invention to beseen.

17 is the suspension-bar, which is passed downward through the thwartand made fast to the bottom of the boat, as heretofore, and p is atwo-wheel pulley-block, through which the fall a is rove, and 19 itshook, adapted to 5 engage with the top of the suspension-bar for thepurpose of carrying it. This hook, being the terminal of the fall, ishereinafter referred to as the point of suspension. It is amatter ofindifference, as far as this part of my in- 0 vention is concerned,whether the fall be a single or double one. In either case its terminalwill be the point of suspension.

D is the thwart.

H is the horizontal bar.

In respect of position of the horizontal bar three things are necessary:First, it is as near the top of the suspension-bar as possible; second,it is always at right angles with it; third, the suspension-bar bisectsthe horizontal bar. The two bars are joined together at the bisection inany way, provided that it confers sufficient rigidity on their junctionto always maintain them in the relative positions described above.

The figures show the suspension-bar as passing through an eye which isformed in an enlargement h in the middle of the horizontal bar. h 71 area pair of rigid rods, which respectively connect the outer ends of thebar H to the fall above the point of suspension.

The bar II and the two rods h it constitute a triangle, the apex ofwhich is in the fall. The point of suspension is in or nearlyin thecenter of such triangle.

The operation of the device constructed as above described is asfollows: If the boat is unevenly laden-say on the right-hand side of thesuspension-barthe tendency will be to depress that side and to raise theopposite one. This tendency will, however, be prevented by the rigidrods h and 7?, which will prevent the relative positions of the bar H(which is the base of the triangle) and the apex of the triangle frombeing altered; or, in other words, because the two rods h 7L2, which arethe sides of the triangle, will resist both compression and tension andthe horizontal bar II will be kept in a horizontal position.

I claim In boat-lowering apparatus, the combination of fall,suspension-bar, point of suspension at the end of the fall adapted toengage with and carry the suspension-bar, a horizontal barbisected bythe suspension-bar and joined to it near its top at right angles, and apair of rigid rods connecting the respective outer ends of thehorizontal bar to the fall above the point of suspension, as set forth.

In testimony whereof I have hereunto affixed my signature, in presenceof two witnesses, this 10th day of March, 1891.

HENRY EDVARD BOWRING.

lVitnesses:

G. F. WARREN, 17 Gracechurch Street, London.

HENRY H. LEIGH, 22 Southampton Buildings, Chancery Lame,

London.

